I am getting my first Mac and trying to choose between the 15.2" and the 17" Powerbooks. I will be loading Final Cut Pro and spending some good time learning my way around video editing techniques. Obviously the 17" has the bigger screen with sharper resolution (is the difference between 1280x854 and 1440x900 that noticeable?) but it's substantially less portable and pricier too...and I already feel I am spending a fortune on this purchase. As for the processer, is the 0.08ghz difference even noticeable? Why do they even make the two separate processors? How about the option to upgrade to 5400rpm - is it considered a necessity for video editing work? (I'd hate to skimp out on the last $150 and lose out after already spending so much). Thanks for any advice.